1994 Volume 47 Issue 6 Pages 394-397
An outbreak of fibrinous and necrotizing pleuropneumonia with edema, hyperemia and induration of the lungs, was observed in 128-and 140-day-old piglets in an integrated farm in Aomori Prefecture in October 1992. In the lung lesions of dead cases serotype 8 antigen of Actinobacillus pleuropneumoniae was detected by immunohistochemistry, and the serotype 8 organisms were isolated from the dead cases as well as slaughtered cases from the same farm. All the isolates were sensitive to all antibiotics tested. Positive rates of complement fixing antibody to the serotype 8 organisms were 30% and 87% in breeding sows and slaughtered pigs, respectively, and 4 of 6 neighbour farms tested were also sero positive (17-71%).
